Re: [Phpwiki-talk] How to delete a specific revision?

[Joby W. <joby@u.washington.edu>]

Martin Geisler wrote:
> Aha, like a linked list? But the comments also say that you cannot
> modify a revision, you can only create or delete them, so perhaps this
> is a bigger issue?
> 

Kinda.  I'm not a huge fan of the current structure, but as far as I can 
see by looking at the database (version table).  Each record stores the 
mtime of the version number that replaces it.  Thus the following would 
have to happen:

I'll use R0 for the revision to be deleted. R1 for a revision that might 
follow R0.  And R-1 for the revision that is prior to R0.

If the purged revision is the newest:
1) delete R0
2) revert R-1 to be the final version

If there is a R1:
1) grab from R0 the mtime of R1
2) change the mtime stored in R-1 (which would be R0) to value in 1)
3) delete R0.

There might be other consiquenses.  I haven't looked too much into this. 
  The developers that have been around longer would know.

> But I imagined that it should work just like the 'Remove Page' button
> that only appears when you're signed in as the administrator. So
> normal users shouldn't have access to it.
> 

That's not really the issue.  I don't want _ANYONE_ to be able to delete 
versions.  Although I have an intesive backup scheme, I don't want to 
lose any data -- even if undesireable.  Of course I am implimenting some 
severe editing restrictions so undesireable content is unlikely to 
occur.  I would prefer if this functionality would have to be enabled 
via a defined constant in index.php.

jbw